/*首页头部广告*/
.header-ad{ width: 100%; overflow: hidden; position: relative;}
.header-ad img{ width: 100%; height:auto; }
.header-ad a.closed-had { display: block; width: 20px; text-align: center; height: 20px;  color: #fff;  transition: all ease .25s; background-color: rgba(0,0,0,.55); border-radius: 20px; position: absolute; right: 50px; top:20%; }
.header-ad a.closed-had:hover{ color: #fff; transform: rotate(180deg); }